/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:49:45,470 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:49:45,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:49:45,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:49:45,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:49:45,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:49:45,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:49:45,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:49:45,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:49:45,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:49:45,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:49:45,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:49:45,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:49:45,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:49:45,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:49:45,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:49:45,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:49:45,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:49:45,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:49:45,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:49:45,563 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:49:45,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:49:45,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:49:45,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:49:45,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:49:45,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:49:45,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:49:45,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:49:45,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:49:45,566 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:49:45,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:49:45,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:49:45,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:49:45,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:49:45,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:49:45,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:49:45,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:49:45,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:49:45,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:49:45,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:49:45,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:49:45,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:49:45,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:45,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:49:45,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:49:45,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:49:45,916 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:49:45,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:49:45,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:49:45,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:49:45,940 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:49:45,941 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 00:49:46,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ada858/76841278dd85455c8a470b6c54b88bd4/FLAG1b4f963cd [2020-07-21 00:49:46,642 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:49:46,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 00:49:46,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ada858/76841278dd85455c8a470b6c54b88bd4/FLAG1b4f963cd [2020-07-21 00:49:46,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ada858/76841278dd85455c8a470b6c54b88bd4 [2020-07-21 00:49:46,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:49:46,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:49:46,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:49:46,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:49:46,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:49:46,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:49:46" (1/1) ... [2020-07-21 00:49:46,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf42421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:46, skipping insertion in model container [2020-07-21 00:49:46,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:49:46" (1/1) ... [2020-07-21 00:49:47,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:49:47,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:49:47,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:49:47,296 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:49:47,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:49:47,336 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:49:47,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47 WrapperNode [2020-07-21 00:49:47,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:49:47,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:49:47,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:49:47,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:49:47,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... [2020-07-21 00:49:47,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:49:47,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:49:47,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:49:47,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:49:47,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:49:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:49:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:49:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:49:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:49:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:49:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:49:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:49:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:49:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:49:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:49:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:49:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:49:47,838 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:49:47,838 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:49:47,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:49:47 BoogieIcfgContainer [2020-07-21 00:49:47,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:49:47,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:49:47,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:49:47,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:49:47,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:49:46" (1/3) ... [2020-07-21 00:49:47,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416f0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:49:47, skipping insertion in model container [2020-07-21 00:49:47,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:47" (2/3) ... [2020-07-21 00:49:47,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416f0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:49:47, skipping insertion in model container [2020-07-21 00:49:47,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:49:47" (3/3) ... [2020-07-21 00:49:47,854 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-21 00:49:47,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:49:47,873 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:49:47,891 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:49:47,919 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:49:47,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:49:47,920 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:49:47,920 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:49:47,920 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:49:47,920 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:49:47,921 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:49:47,921 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:49:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:49:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:49:47,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:47,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:47,950 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:49:47,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:47,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735917119] [2020-07-21 00:49:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:48,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:48,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:49:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:49:48,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:49:48,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735917119] [2020-07-21 00:49:48,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:49:48,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:49:48,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8765109] [2020-07-21 00:49:48,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:49:48,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:48,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:49:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:49:48,240 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:49:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:48,393 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:49:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:49:48,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:49:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:48,410 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:49:48,410 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:49:48,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:49:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:49:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:49:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:49:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:49:48,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:49:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:48,484 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:49:48,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:49:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:49:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:49:48,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:48,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:48,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:48,704 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:49:48,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:48,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736067744] [2020-07-21 00:49:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:48,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:48,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:49:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:49:48,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:49:48,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736067744] [2020-07-21 00:49:48,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:49:48,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:49:48,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574470774] [2020-07-21 00:49:48,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:49:48,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:49:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:49:48,785 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:49:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:48,873 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:49:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:49:48,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:49:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:48,877 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:49:48,877 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:49:48,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:49:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:49:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:49:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:49:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:49:48,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:49:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:48,891 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:49:48,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:49:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:49:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:49:48,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:48,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:49,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:49,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:49:49,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:49,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896211490] [2020-07-21 00:49:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:49,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:49:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:49,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:49,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:49,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896211490] [2020-07-21 00:49:49,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:49,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:49:49,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285141743] [2020-07-21 00:49:49,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:49:49,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:49:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:49:49,572 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:49:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:49,757 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:49:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:49:49,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:49:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:49,761 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:49:49,762 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:49:49,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:49:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:49:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:49:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:49:49,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:49:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:49,780 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:49:49,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:49:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:49:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:49:49,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:49,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:49,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:49,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:49:49,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:49,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693891572] [2020-07-21 00:49:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:50,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:49:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:50,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:50,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:50,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693891572] [2020-07-21 00:49:50,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:50,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:49:50,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488018571] [2020-07-21 00:49:50,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:49:50,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:49:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:49:50,320 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:49:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:50,514 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:49:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:49:50,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:49:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:50,518 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:49:50,519 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:49:50,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:49:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:49:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:49:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:49:50,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:49:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:50,541 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:49:50,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:49:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:49:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:49:50,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:50,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:50,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:50,757 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:49:50,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:50,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276484679] [2020-07-21 00:49:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:50,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:50,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:49:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:49:50,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:51,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:49:51,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276484679] [2020-07-21 00:49:51,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:51,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:49:51,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884307514] [2020-07-21 00:49:51,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:49:51,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:49:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:51,346 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:49:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:51,539 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:49:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:49:51,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:49:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:51,541 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:49:51,541 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:49:51,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:49:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:49:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:49:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:49:51,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:49:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:51,555 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:49:51,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:49:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:49:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:49:51,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:51,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:51,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:51,772 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:49:51,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:51,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137662893] [2020-07-21 00:49:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:51,804 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:49:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:49:51,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:52,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:49:52,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137662893] [2020-07-21 00:49:52,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:52,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:49:52,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483404016] [2020-07-21 00:49:52,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:49:52,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:49:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:52,218 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 00:49:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:52,409 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:49:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:49:52,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 00:49:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:52,418 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:49:52,418 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:49:52,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:49:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:49:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:49:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:49:52,444 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:49:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:52,445 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:49:52,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:49:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:49:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:49:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:52,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:52,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:52,659 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:49:52,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:52,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795444621] [2020-07-21 00:49:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:52,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:49:52,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:53,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:49:53,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795444621] [2020-07-21 00:49:53,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:53,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:49:53,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484386898] [2020-07-21 00:49:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:49:53,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:49:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:49:53,376 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 00:49:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:53,586 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:49:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:53,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 00:49:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:53,589 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:49:53,589 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:49:53,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:49:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:49:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:49:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:49:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:49:53,601 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:49:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:53,601 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:49:53,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:49:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:49:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:49:53,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:53,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:53,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:53,820 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:49:53,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:53,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061266603] [2020-07-21 00:49:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:53,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:53,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 00:49:53,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:54,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:49:54,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061266603] [2020-07-21 00:49:54,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:54,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:49:54,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533615704] [2020-07-21 00:49:54,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:49:54,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:49:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:49:54,546 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 00:49:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:54,769 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 00:49:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:54,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 00:49:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:54,773 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:49:54,773 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:49:54,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:49:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:49:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 00:49:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:49:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:49:54,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 00:49:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:54,790 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:49:54,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:49:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:49:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 00:49:54,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:54,793 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:55,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:55,007 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:55,008 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 00:49:55,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:55,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117790646] [2020-07-21 00:49:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:55,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:55,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 00:49:55,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:55,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:56,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:56,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:56,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:56,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 00:49:56,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117790646] [2020-07-21 00:49:56,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:56,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:49:56,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672399320] [2020-07-21 00:49:56,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:49:56,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:56,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:49:56,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:49:56,152 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 00:49:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:56,461 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 00:49:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:56,462 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 00:49:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:56,464 INFO L225 Difference]: With dead ends: 71 [2020-07-21 00:49:56,465 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:49:56,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:49:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 00:49:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:49:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:49:56,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 00:49:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:56,479 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:49:56,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:49:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:49:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:49:56,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:56,482 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:56,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:56,691 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 00:49:56,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:56,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789937747] [2020-07-21 00:49:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:56,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:56,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 00:49:56,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:57,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 00:49:57,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789937747] [2020-07-21 00:49:57,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:57,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:49:57,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141430616] [2020-07-21 00:49:57,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:49:57,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:49:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:49:57,856 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 00:49:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:58,123 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 00:49:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:58,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 00:49:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:58,127 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:49:58,127 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:49:58,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:49:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 00:49:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:49:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:49:58,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 00:49:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:58,168 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:49:58,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:49:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:49:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 00:49:58,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:58,171 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:58,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:58,386 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:58,386 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 00:49:58,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:58,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750593053] [2020-07-21 00:49:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:58,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:58,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:49:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 00:49:58,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:59,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 00:50:00,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750593053] [2020-07-21 00:50:00,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:00,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:50:00,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257880779] [2020-07-21 00:50:00,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:50:00,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:00,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:50:00,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:50:00,379 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 00:50:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:00,701 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 00:50:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:00,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 00:50:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:00,706 INFO L225 Difference]: With dead ends: 81 [2020-07-21 00:50:00,706 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 00:50:00,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:50:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 00:50:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 00:50:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:50:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:50:00,720 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 00:50:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:00,721 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:50:00,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:50:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:50:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:50:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:00,724 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:00,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:00,938 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 00:50:00,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:00,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176279044] [2020-07-21 00:50:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:01,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:01,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:01,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 00:50:01,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:02,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 00:50:02,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176279044] [2020-07-21 00:50:02,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:02,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:50:02,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086261865] [2020-07-21 00:50:02,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:50:02,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:50:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:50:02,680 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 00:50:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:03,072 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 00:50:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:03,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 00:50:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:03,078 INFO L225 Difference]: With dead ends: 86 [2020-07-21 00:50:03,079 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 00:50:03,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:50:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 00:50:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 00:50:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:50:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:50:03,109 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 00:50:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:03,109 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:50:03,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:50:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:50:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 00:50:03,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:03,114 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:03,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:03,338 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 00:50:03,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:03,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128709409] [2020-07-21 00:50:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:03,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:50:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 00:50:03,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:05,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 00:50:06,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128709409] [2020-07-21 00:50:06,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:06,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:50:06,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100948660] [2020-07-21 00:50:06,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:50:06,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:50:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:50:06,156 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 00:50:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:06,605 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 00:50:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:06,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 00:50:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:06,609 INFO L225 Difference]: With dead ends: 91 [2020-07-21 00:50:06,609 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 00:50:06,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:50:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 00:50:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 00:50:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:50:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:50:06,622 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 00:50:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:06,623 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:50:06,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:50:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:50:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 00:50:06,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:06,627 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:06,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:06,843 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 00:50:06,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:06,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600691126] [2020-07-21 00:50:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:06,951 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:50:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 00:50:07,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:08,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 00:50:09,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600691126] [2020-07-21 00:50:09,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:09,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:50:09,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792427402] [2020-07-21 00:50:09,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:50:09,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:50:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:09,533 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 00:50:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:09,965 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 00:50:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:09,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 00:50:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:09,972 INFO L225 Difference]: With dead ends: 96 [2020-07-21 00:50:09,973 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 00:50:09,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:50:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 00:50:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 00:50:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:50:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:50:09,996 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 00:50:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:09,998 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:50:09,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:50:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:50:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 00:50:10,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:10,004 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:10,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:10,218 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 00:50:10,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:10,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663667135] [2020-07-21 00:50:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:10,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:10,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 00:50:10,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:12,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:13,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:13,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:13,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:13,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 00:50:14,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663667135] [2020-07-21 00:50:14,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:14,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:14,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935425656] [2020-07-21 00:50:14,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:14,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:14,689 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 00:50:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:15,267 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 00:50:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:15,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 00:50:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:15,275 INFO L225 Difference]: With dead ends: 101 [2020-07-21 00:50:15,275 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 00:50:15,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 00:50:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 00:50:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:50:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 00:50:15,297 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 00:50:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:15,298 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 00:50:15,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 00:50:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 00:50:15,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:15,305 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:15,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:15,520 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 00:50:15,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:15,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253329266] [2020-07-21 00:50:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:15,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:50:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 00:50:15,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:17,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 00:50:19,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253329266] [2020-07-21 00:50:19,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:19,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:50:19,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914746558] [2020-07-21 00:50:19,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:50:19,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:50:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:19,098 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 00:50:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:19,588 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 00:50:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:19,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 00:50:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:19,594 INFO L225 Difference]: With dead ends: 129 [2020-07-21 00:50:19,594 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 00:50:19,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:50:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 00:50:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 00:50:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 00:50:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 00:50:19,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 00:50:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:19,632 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 00:50:19,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:50:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 00:50:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 00:50:19,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:19,637 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:19,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:19,852 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 00:50:19,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:19,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774935556] [2020-07-21 00:50:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:20,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 00:50:20,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:21,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 00:50:22,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774935556] [2020-07-21 00:50:22,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:22,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:50:22,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816827411] [2020-07-21 00:50:22,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:22,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:22,922 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 00:50:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:23,324 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 00:50:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:23,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 00:50:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:23,330 INFO L225 Difference]: With dead ends: 139 [2020-07-21 00:50:23,330 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 00:50:23,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 00:50:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 00:50:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 00:50:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 00:50:23,352 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 00:50:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:23,353 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 00:50:23,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 00:50:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 00:50:23,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:23,358 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:23,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:23,574 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 00:50:23,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:23,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608954763] [2020-07-21 00:50:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:23,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-21 00:50:24,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:26,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:27,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 00:50:29,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608954763] [2020-07-21 00:50:29,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:29,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:29,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664026046] [2020-07-21 00:50:29,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:29,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:29,194 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 00:50:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:29,767 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 00:50:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:29,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 00:50:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:29,771 INFO L225 Difference]: With dead ends: 166 [2020-07-21 00:50:29,771 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 00:50:29,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 00:50:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 00:50:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 00:50:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 00:50:29,790 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 00:50:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:29,791 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 00:50:29,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 00:50:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 00:50:29,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:29,797 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 26, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:30,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:30,010 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2146290224, now seen corresponding path program 2 times [2020-07-21 00:50:30,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:30,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368461733] [2020-07-21 00:50:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:30,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:50:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 993 refuted. 0 times theorem prover too weak. 6212 trivial. 0 not checked. [2020-07-21 00:50:30,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:32,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:32,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:33,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:33,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:33,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:33,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:34,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:34,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:34,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 1014 refuted. 0 times theorem prover too weak. 6191 trivial. 0 not checked. [2020-07-21 00:50:34,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368461733] [2020-07-21 00:50:34,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:34,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:50:34,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563224749] [2020-07-21 00:50:34,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:50:34,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:50:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:34,375 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 00:50:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:34,907 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 00:50:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:34,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-21 00:50:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:34,913 INFO L225 Difference]: With dead ends: 167 [2020-07-21 00:50:34,913 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 00:50:34,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 989 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:50:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 00:50:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 00:50:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 00:50:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 00:50:34,936 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 511 [2020-07-21 00:50:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:34,937 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 00:50:34,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:50:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 00:50:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 00:50:34,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:34,943 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 24, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:35,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:35,158 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash 477279642, now seen corresponding path program 3 times [2020-07-21 00:50:35,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:35,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313226881] [2020-07-21 00:50:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:35,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:35,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 238 proven. 689 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2020-07-21 00:50:35,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:37,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:37,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:37,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 238 proven. 705 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2020-07-21 00:50:38,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313226881] [2020-07-21 00:50:38,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:38,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:50:38,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353421154] [2020-07-21 00:50:38,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:38,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:38,565 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 17 states. [2020-07-21 00:50:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:38,929 INFO L93 Difference]: Finished difference Result 173 states and 423 transitions. [2020-07-21 00:50:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:38,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 433 [2020-07-21 00:50:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:38,935 INFO L225 Difference]: With dead ends: 173 [2020-07-21 00:50:38,935 INFO L226 Difference]: Without dead ends: 158 [2020-07-21 00:50:38,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 837 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-21 00:50:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 101. [2020-07-21 00:50:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 00:50:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 180 transitions. [2020-07-21 00:50:38,956 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 180 transitions. Word has length 433 [2020-07-21 00:50:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:38,957 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 180 transitions. [2020-07-21 00:50:38,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 180 transitions. [2020-07-21 00:50:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 00:50:38,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:38,962 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 22, 19, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:39,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:39,176 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 521895211, now seen corresponding path program 4 times [2020-07-21 00:50:39,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:39,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103291969] [2020-07-21 00:50:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:39,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 283 proven. 711 refuted. 0 times theorem prover too weak. 2748 trivial. 0 not checked. [2020-07-21 00:50:39,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:42,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 285 proven. 739 refuted. 0 times theorem prover too weak. 2718 trivial. 0 not checked. [2020-07-21 00:50:44,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103291969] [2020-07-21 00:50:44,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:44,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:44,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118890242] [2020-07-21 00:50:44,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:44,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:44,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:44,550 INFO L87 Difference]: Start difference. First operand 101 states and 180 transitions. Second operand 21 states. [2020-07-21 00:50:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:45,274 INFO L93 Difference]: Finished difference Result 198 states and 537 transitions. [2020-07-21 00:50:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:45,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 366 [2020-07-21 00:50:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:45,279 INFO L225 Difference]: With dead ends: 198 [2020-07-21 00:50:45,279 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 00:50:45,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 695 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 00:50:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-21 00:50:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 00:50:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 00:50:45,300 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 366 [2020-07-21 00:50:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:45,301 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 00:50:45,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 00:50:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-07-21 00:50:45,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:45,306 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 22, 21, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:45,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:45,520 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1116898987, now seen corresponding path program 5 times [2020-07-21 00:50:45,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:45,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370478839] [2020-07-21 00:50:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:45,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:45,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:50:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4881 backedges. 232 proven. 770 refuted. 0 times theorem prover too weak. 3879 trivial. 0 not checked. [2020-07-21 00:50:46,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:48,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:48,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:48,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:48,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4881 backedges. 234 proven. 789 refuted. 0 times theorem prover too weak. 3858 trivial. 0 not checked. [2020-07-21 00:50:49,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370478839] [2020-07-21 00:50:49,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:49,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:50:49,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128389129] [2020-07-21 00:50:49,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:50:49,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:49,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:50:49,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:49,567 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 00:50:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:49,958 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 00:50:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:49,963 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 416 [2020-07-21 00:50:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:49,966 INFO L225 Difference]: With dead ends: 172 [2020-07-21 00:50:49,966 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 00:50:49,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 799 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:50:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 00:50:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 00:50:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 00:50:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 00:50:49,986 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 416 [2020-07-21 00:50:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:49,987 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 00:50:49,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:50:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 00:50:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 00:50:49,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:49,992 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:50,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,206 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1942210518, now seen corresponding path program 6 times [2020-07-21 00:50:50,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:50,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187030212] [2020-07-21 00:50:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 232 proven. 676 refuted. 0 times theorem prover too weak. 4414 trivial. 0 not checked. [2020-07-21 00:50:50,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:52,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 232 proven. 690 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2020-07-21 00:50:53,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187030212] [2020-07-21 00:50:53,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:53,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:50:53,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571999103] [2020-07-21 00:50:53,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:53,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:53,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:53,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:53,724 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 00:50:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:54,108 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 00:50:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:54,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 434 [2020-07-21 00:50:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:54,113 INFO L225 Difference]: With dead ends: 190 [2020-07-21 00:50:54,114 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 00:50:54,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 839 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 00:50:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 00:50:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 00:50:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 00:50:54,135 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 434 [2020-07-21 00:50:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:54,136 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 00:50:54,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 00:50:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 00:50:54,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:54,141 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 31, 28, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 14, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:54,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:54,355 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1821771079, now seen corresponding path program 7 times [2020-07-21 00:50:54,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:54,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266529629] [2020-07-21 00:50:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:54,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:54,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7279 backedges. 455 proven. 983 refuted. 0 times theorem prover too weak. 5841 trivial. 0 not checked. [2020-07-21 00:50:54,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:57,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7279 backedges. 457 proven. 1011 refuted. 0 times theorem prover too weak. 5811 trivial. 0 not checked. [2020-07-21 00:51:00,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266529629] [2020-07-21 00:51:00,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:00,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:51:00,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516520482] [2020-07-21 00:51:00,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:51:00,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:51:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:51:00,735 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 21 states. [2020-07-21 00:51:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:01,405 INFO L93 Difference]: Finished difference Result 145 states and 272 transitions. [2020-07-21 00:51:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:51:01,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 504 [2020-07-21 00:51:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:01,410 INFO L225 Difference]: With dead ends: 145 [2020-07-21 00:51:01,410 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 00:51:01,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 971 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:51:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 00:51:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-07-21 00:51:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-21 00:51:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 201 transitions. [2020-07-21 00:51:01,427 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 201 transitions. Word has length 504 [2020-07-21 00:51:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:01,428 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 201 transitions. [2020-07-21 00:51:01,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:51:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 201 transitions. [2020-07-21 00:51:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-21 00:51:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:01,434 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 38, 38, 35, 32, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 19, 16, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:01,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:01,649 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash 198773854, now seen corresponding path program 8 times [2020-07-21 00:51:01,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:01,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341536969] [2020-07-21 00:51:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:02,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 304 proven. 948 refuted. 0 times theorem prover too weak. 8219 trivial. 0 not checked. [2020-07-21 00:51:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:04,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:06,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 306 proven. 962 refuted. 0 times theorem prover too weak. 8203 trivial. 0 not checked. [2020-07-21 00:51:06,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341536969] [2020-07-21 00:51:06,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:06,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:51:06,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947153341] [2020-07-21 00:51:06,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:51:06,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:51:06,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:51:06,439 INFO L87 Difference]: Start difference. First operand 117 states and 201 transitions. Second operand 17 states. [2020-07-21 00:51:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:06,849 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2020-07-21 00:51:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:06,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 572 [2020-07-21 00:51:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:06,856 INFO L225 Difference]: With dead ends: 164 [2020-07-21 00:51:06,857 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 00:51:06,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1115 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 00:51:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-07-21 00:51:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 00:51:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 240 transitions. [2020-07-21 00:51:06,884 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 240 transitions. Word has length 572 [2020-07-21 00:51:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:06,884 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 240 transitions. [2020-07-21 00:51:06,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:51:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 240 transitions. [2020-07-21 00:51:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 00:51:06,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:06,890 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:07,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:07,105 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:07,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2066235329, now seen corresponding path program 9 times [2020-07-21 00:51:07,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:07,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294553523] [2020-07-21 00:51:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:07,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 287 proven. 508 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2020-07-21 00:51:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:10,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:10,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:10,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:10,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:10,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:11,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:11,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:11,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:11,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3203 backedges. 289 proven. 527 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2020-07-21 00:51:11,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294553523] [2020-07-21 00:51:11,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:11,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:51:11,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22784982] [2020-07-21 00:51:11,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:51:11,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:51:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:51:11,581 INFO L87 Difference]: Start difference. First operand 129 states and 240 transitions. Second operand 19 states. [2020-07-21 00:51:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:11,941 INFO L93 Difference]: Finished difference Result 172 states and 344 transitions. [2020-07-21 00:51:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:51:11,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 339 [2020-07-21 00:51:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:11,946 INFO L225 Difference]: With dead ends: 172 [2020-07-21 00:51:11,946 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 00:51:11,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 645 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:51:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 00:51:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-07-21 00:51:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-21 00:51:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2020-07-21 00:51:11,967 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 339 [2020-07-21 00:51:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:11,967 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2020-07-21 00:51:11,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:51:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2020-07-21 00:51:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-21 00:51:11,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:11,973 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 23, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 9, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:12,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:12,187 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1093087284, now seen corresponding path program 10 times [2020-07-21 00:51:12,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:12,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204448570] [2020-07-21 00:51:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:12,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 265 proven. 516 refuted. 0 times theorem prover too weak. 3274 trivial. 0 not checked. [2020-07-21 00:51:12,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:14,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:14,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:15,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:16,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 265 proven. 532 refuted. 0 times theorem prover too weak. 3258 trivial. 0 not checked. [2020-07-21 00:51:16,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204448570] [2020-07-21 00:51:16,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:16,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:51:16,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855503957] [2020-07-21 00:51:16,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:51:16,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:51:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:51:16,329 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand 17 states. [2020-07-21 00:51:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:16,736 INFO L93 Difference]: Finished difference Result 184 states and 375 transitions. [2020-07-21 00:51:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:16,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 381 [2020-07-21 00:51:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:16,742 INFO L225 Difference]: With dead ends: 184 [2020-07-21 00:51:16,742 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 00:51:16,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 733 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 00:51:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2020-07-21 00:51:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 00:51:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-21 00:51:16,763 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 381 [2020-07-21 00:51:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:16,763 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-21 00:51:16,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:51:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-21 00:51:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 00:51:16,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:16,769 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:16,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:16,984 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2040158693, now seen corresponding path program 11 times [2020-07-21 00:51:16,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:16,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662707283] [2020-07-21 00:51:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:17,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:17,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:51:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 242 proven. 454 refuted. 0 times theorem prover too weak. 3652 trivial. 0 not checked. [2020-07-21 00:51:17,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:19,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 242 proven. 464 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2020-07-21 00:51:20,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662707283] [2020-07-21 00:51:20,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:20,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:51:20,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731340505] [2020-07-21 00:51:20,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:51:20,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:20,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:51:20,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:51:20,240 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 15 states. [2020-07-21 00:51:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:20,616 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-07-21 00:51:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:20,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2020-07-21 00:51:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:20,623 INFO L225 Difference]: With dead ends: 212 [2020-07-21 00:51:20,623 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 00:51:20,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 763 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:51:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 00:51:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2020-07-21 00:51:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 00:51:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-21 00:51:20,651 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 394 [2020-07-21 00:51:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:20,652 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-21 00:51:20,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:51:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-21 00:51:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 00:51:20,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:20,658 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:20,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:20,872 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2142506005, now seen corresponding path program 12 times [2020-07-21 00:51:20,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:20,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180194866] [2020-07-21 00:51:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:21,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:21,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 392 proven. 439 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2020-07-21 00:51:21,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:23,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 394 proven. 453 refuted. 0 times theorem prover too weak. 3524 trivial. 0 not checked. [2020-07-21 00:51:24,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180194866] [2020-07-21 00:51:24,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:24,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:51:24,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547178034] [2020-07-21 00:51:24,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:51:24,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:51:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:51:24,872 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 17 states. [2020-07-21 00:51:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:25,343 INFO L93 Difference]: Finished difference Result 176 states and 378 transitions. [2020-07-21 00:51:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:25,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-21 00:51:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:25,349 INFO L225 Difference]: With dead ends: 176 [2020-07-21 00:51:25,349 INFO L226 Difference]: Without dead ends: 167 [2020-07-21 00:51:25,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-07-21 00:51:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-07-21 00:51:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 00:51:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 288 transitions. [2020-07-21 00:51:25,375 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 288 transitions. Word has length 395 [2020-07-21 00:51:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:25,376 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 288 transitions. [2020-07-21 00:51:25,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:51:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 288 transitions. [2020-07-21 00:51:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-07-21 00:51:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:25,387 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 42, 42, 37, 36, 24, 24, 24, 24, 24, 24, 24, 21, 21, 21, 21, 21, 21, 21, 16, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:25,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:25,602 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash -433470904, now seen corresponding path program 13 times [2020-07-21 00:51:25,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:25,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618603232] [2020-07-21 00:51:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:26,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:51:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11388 backedges. 667 proven. 1167 refuted. 0 times theorem prover too weak. 9554 trivial. 0 not checked. [2020-07-21 00:51:26,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:30,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11388 backedges. 667 proven. 1197 refuted. 0 times theorem prover too weak. 9524 trivial. 0 not checked. [2020-07-21 00:51:33,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618603232] [2020-07-21 00:51:33,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:33,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:51:33,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501056050] [2020-07-21 00:51:33,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:51:33,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:51:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:51:33,870 INFO L87 Difference]: Start difference. First operand 144 states and 288 transitions. Second operand 21 states. [2020-07-21 00:51:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:34,667 INFO L93 Difference]: Finished difference Result 178 states and 356 transitions. [2020-07-21 00:51:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:51:34,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 626 [2020-07-21 00:51:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:34,674 INFO L225 Difference]: With dead ends: 178 [2020-07-21 00:51:34,675 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 00:51:34,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1215 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:51:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 00:51:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2020-07-21 00:51:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 00:51:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 300 transitions. [2020-07-21 00:51:34,706 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 300 transitions. Word has length 626 [2020-07-21 00:51:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:34,707 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 300 transitions. [2020-07-21 00:51:34,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:51:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 300 transitions. [2020-07-21 00:51:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 00:51:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:34,718 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 26, 26, 23, 23, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:34,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:34,933 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1190787456, now seen corresponding path program 14 times [2020-07-21 00:51:34,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:34,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771704726] [2020-07-21 00:51:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:35,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:35,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 402 proven. 604 refuted. 0 times theorem prover too weak. 3704 trivial. 0 not checked. [2020-07-21 00:51:35,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:37,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:38,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:38,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:38,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 406 proven. 621 refuted. 0 times theorem prover too weak. 3683 trivial. 0 not checked. [2020-07-21 00:51:39,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771704726] [2020-07-21 00:51:39,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:39,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:51:39,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300334849] [2020-07-21 00:51:39,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:51:39,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:51:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:51:39,726 INFO L87 Difference]: Start difference. First operand 152 states and 300 transitions. Second operand 19 states. [2020-07-21 00:51:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:40,386 INFO L93 Difference]: Finished difference Result 218 states and 466 transitions. [2020-07-21 00:51:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:51:40,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 407 [2020-07-21 00:51:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:40,393 INFO L225 Difference]: With dead ends: 218 [2020-07-21 00:51:40,393 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 00:51:40,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 781 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:51:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 00:51:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-07-21 00:51:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 00:51:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 362 transitions. [2020-07-21 00:51:40,423 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 362 transitions. Word has length 407 [2020-07-21 00:51:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:40,424 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 362 transitions. [2020-07-21 00:51:40,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:51:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 362 transitions. [2020-07-21 00:51:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 00:51:40,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:40,434 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 21, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:40,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:40,648 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1568931918, now seen corresponding path program 15 times [2020-07-21 00:51:40,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:40,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836826300] [2020-07-21 00:51:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:41,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:41,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 305 proven. 589 refuted. 0 times theorem prover too weak. 4344 trivial. 0 not checked. [2020-07-21 00:51:41,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:43,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:45,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:45,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:45,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:45,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 307 proven. 601 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2020-07-21 00:51:45,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836826300] [2020-07-21 00:51:45,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:45,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:51:45,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099099539] [2020-07-21 00:51:45,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:51:45,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:51:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:51:45,538 INFO L87 Difference]: Start difference. First operand 175 states and 362 transitions. Second operand 17 states. [2020-07-21 00:51:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:46,046 INFO L93 Difference]: Finished difference Result 230 states and 502 transitions. [2020-07-21 00:51:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:46,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 430 [2020-07-21 00:51:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:46,053 INFO L225 Difference]: With dead ends: 230 [2020-07-21 00:51:46,054 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 00:51:46,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 831 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 00:51:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 173. [2020-07-21 00:51:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:51:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 352 transitions. [2020-07-21 00:51:46,084 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 352 transitions. Word has length 430 [2020-07-21 00:51:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:46,085 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 352 transitions. [2020-07-21 00:51:46,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:51:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 352 transitions. [2020-07-21 00:51:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-07-21 00:51:46,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:46,093 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 21, 21, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:46,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:46,307 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2112990561, now seen corresponding path program 16 times [2020-07-21 00:51:46,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:46,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841477736] [2020-07-21 00:51:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:46,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:46,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:51:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4312 backedges. 358 proven. 507 refuted. 0 times theorem prover too weak. 3447 trivial. 0 not checked. [2020-07-21 00:51:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:49,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4312 backedges. 360 proven. 519 refuted. 0 times theorem prover too weak. 3433 trivial. 0 not checked. [2020-07-21 00:51:51,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841477736] [2020-07-21 00:51:51,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:51,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 00:51:51,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078173409] [2020-07-21 00:51:51,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:51:51,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:51:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:51:51,755 INFO L87 Difference]: Start difference. First operand 173 states and 352 transitions. Second operand 19 states. [2020-07-21 00:51:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:52,432 INFO L93 Difference]: Finished difference Result 231 states and 479 transitions. [2020-07-21 00:51:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:51:52,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 391 [2020-07-21 00:51:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:52,437 INFO L225 Difference]: With dead ends: 231 [2020-07-21 00:51:52,438 INFO L226 Difference]: Without dead ends: 197 [2020-07-21 00:51:52,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 751 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-21 00:51:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 162. [2020-07-21 00:51:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 00:51:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 310 transitions. [2020-07-21 00:51:52,459 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 310 transitions. Word has length 391 [2020-07-21 00:51:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:52,460 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 310 transitions. [2020-07-21 00:51:52,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:51:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 310 transitions. [2020-07-21 00:51:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 00:51:52,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:52,466 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 21, 20, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:52,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:52,681 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1940035239, now seen corresponding path program 17 times [2020-07-21 00:51:52,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:52,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337418897] [2020-07-21 00:51:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:53,176 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:53,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 455 proven. 415 refuted. 0 times theorem prover too weak. 2886 trivial. 0 not checked. [2020-07-21 00:51:53,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:56,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:56,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:56,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:56,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:57,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 459 proven. 432 refuted. 0 times theorem prover too weak. 2865 trivial. 0 not checked. [2020-07-21 00:51:58,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337418897] [2020-07-21 00:51:58,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:58,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:51:58,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269881053] [2020-07-21 00:51:58,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:51:58,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:51:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:51:58,810 INFO L87 Difference]: Start difference. First operand 162 states and 310 transitions. Second operand 19 states. [2020-07-21 00:51:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:59,526 INFO L93 Difference]: Finished difference Result 221 states and 458 transitions. [2020-07-21 00:51:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:51:59,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 366 [2020-07-21 00:51:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:59,532 INFO L225 Difference]: With dead ends: 221 [2020-07-21 00:51:59,533 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 00:51:59,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 699 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:51:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 00:51:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2020-07-21 00:51:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 00:51:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 310 transitions. [2020-07-21 00:51:59,560 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 310 transitions. Word has length 366 [2020-07-21 00:51:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:59,561 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 310 transitions. [2020-07-21 00:51:59,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:51:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 310 transitions. [2020-07-21 00:51:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 00:51:59,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:59,568 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:59,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:59,782 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 835428439, now seen corresponding path program 18 times [2020-07-21 00:51:59,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:59,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259615201] [2020-07-21 00:51:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:00,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:00,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:52:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 404 proven. 410 refuted. 0 times theorem prover too weak. 3557 trivial. 0 not checked. [2020-07-21 00:52:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:02,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 406 proven. 422 refuted. 0 times theorem prover too weak. 3543 trivial. 0 not checked. [2020-07-21 00:52:04,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259615201] [2020-07-21 00:52:04,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:04,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:52:04,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543705056] [2020-07-21 00:52:04,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:52:04,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:52:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:52:04,867 INFO L87 Difference]: Start difference. First operand 162 states and 310 transitions. Second operand 17 states. [2020-07-21 00:52:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:05,632 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2020-07-21 00:52:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:52:05,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-21 00:52:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:05,641 INFO L225 Difference]: With dead ends: 251 [2020-07-21 00:52:05,641 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 00:52:05,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:52:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 00:52:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 157. [2020-07-21 00:52:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 00:52:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2020-07-21 00:52:05,674 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 395 [2020-07-21 00:52:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:05,675 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2020-07-21 00:52:05,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:52:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2020-07-21 00:52:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 00:52:05,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:05,681 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:05,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:05,895 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1033983254, now seen corresponding path program 19 times [2020-07-21 00:52:05,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:05,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647193420] [2020-07-21 00:52:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:06,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:06,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:52:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 362 proven. 366 refuted. 0 times theorem prover too weak. 3981 trivial. 0 not checked. [2020-07-21 00:52:06,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:08,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 362 proven. 378 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2020-07-21 00:52:09,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647193420] [2020-07-21 00:52:09,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:09,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:52:09,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022415981] [2020-07-21 00:52:09,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:52:09,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:52:09,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:52:09,796 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand 15 states. [2020-07-21 00:52:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:10,093 INFO L93 Difference]: Finished difference Result 288 states and 702 transitions. [2020-07-21 00:52:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:52:10,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 409 [2020-07-21 00:52:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:10,099 INFO L225 Difference]: With dead ends: 288 [2020-07-21 00:52:10,100 INFO L226 Difference]: Without dead ends: 279 [2020-07-21 00:52:10,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 793 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:52:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-21 00:52:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 159. [2020-07-21 00:52:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 00:52:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 300 transitions. [2020-07-21 00:52:10,126 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 300 transitions. Word has length 409 [2020-07-21 00:52:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:10,126 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 300 transitions. [2020-07-21 00:52:10,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:52:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 300 transitions. [2020-07-21 00:52:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 00:52:10,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:10,131 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:10,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:10,345 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1065237607, now seen corresponding path program 20 times [2020-07-21 00:52:10,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:10,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422649216] [2020-07-21 00:52:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:10,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:10,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:52:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 431 proven. 378 refuted. 0 times theorem prover too weak. 3539 trivial. 0 not checked. [2020-07-21 00:52:11,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:13,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:13,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:14,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:14,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:14,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:14,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:14,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 431 proven. 394 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2020-07-21 00:52:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422649216] [2020-07-21 00:52:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:15,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:52:15,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530153305] [2020-07-21 00:52:15,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:52:15,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:52:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:52:15,351 INFO L87 Difference]: Start difference. First operand 159 states and 300 transitions. Second operand 17 states. [2020-07-21 00:52:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:15,945 INFO L93 Difference]: Finished difference Result 225 states and 462 transitions. [2020-07-21 00:52:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:52:15,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 394 [2020-07-21 00:52:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:15,951 INFO L225 Difference]: With dead ends: 225 [2020-07-21 00:52:15,952 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 00:52:15,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 759 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:52:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 00:52:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 154. [2020-07-21 00:52:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 00:52:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 282 transitions. [2020-07-21 00:52:15,975 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 282 transitions. Word has length 394 [2020-07-21 00:52:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:15,976 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 282 transitions. [2020-07-21 00:52:15,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:52:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 282 transitions. [2020-07-21 00:52:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 00:52:15,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:15,980 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:16,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:16,182 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash 453125208, now seen corresponding path program 21 times [2020-07-21 00:52:16,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:16,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888330265] [2020-07-21 00:52:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:16,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:52:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 466 proven. 398 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2020-07-21 00:52:17,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:19,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:19,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:19,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:19,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:21,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 470 proven. 410 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 00:52:21,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888330265] [2020-07-21 00:52:21,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:21,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:52:21,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797617779] [2020-07-21 00:52:21,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:52:21,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:52:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:52:21,829 INFO L87 Difference]: Start difference. First operand 154 states and 282 transitions. Second operand 17 states. [2020-07-21 00:52:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:22,446 INFO L93 Difference]: Finished difference Result 233 states and 464 transitions. [2020-07-21 00:52:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:52:22,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2020-07-21 00:52:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:22,454 INFO L225 Difference]: With dead ends: 233 [2020-07-21 00:52:22,455 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 00:52:22,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 787 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:52:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 00:52:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 157. [2020-07-21 00:52:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 00:52:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 292 transitions. [2020-07-21 00:52:22,479 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 292 transitions. Word has length 408 [2020-07-21 00:52:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:22,480 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 292 transitions. [2020-07-21 00:52:22,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:52:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 292 transitions. [2020-07-21 00:52:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-21 00:52:22,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:22,488 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:22,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:22,697 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1530457954, now seen corresponding path program 22 times [2020-07-21 00:52:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:22,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976688958] [2020-07-21 00:52:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:23,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:52:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 426 proven. 620 refuted. 0 times theorem prover too weak. 8367 trivial. 0 not checked. [2020-07-21 00:52:23,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:26,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 428 proven. 628 refuted. 0 times theorem prover too weak. 8357 trivial. 0 not checked. [2020-07-21 00:52:28,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976688958] [2020-07-21 00:52:28,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:28,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:52:28,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657337759] [2020-07-21 00:52:28,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:52:28,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:52:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:52:28,475 INFO L87 Difference]: Start difference. First operand 157 states and 292 transitions. Second operand 15 states. [2020-07-21 00:52:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:28,901 INFO L93 Difference]: Finished difference Result 251 states and 547 transitions. [2020-07-21 00:52:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:52:28,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 572 [2020-07-21 00:52:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:28,908 INFO L225 Difference]: With dead ends: 251 [2020-07-21 00:52:28,908 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 00:52:28,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1119 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:52:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 00:52:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 167. [2020-07-21 00:52:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-21 00:52:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 333 transitions. [2020-07-21 00:52:28,933 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 333 transitions. Word has length 572 [2020-07-21 00:52:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:28,934 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 333 transitions. [2020-07-21 00:52:28,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:52:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 333 transitions. [2020-07-21 00:52:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-07-21 00:52:28,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:28,943 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 38, 35, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 16, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:29,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:29,157 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 945335708, now seen corresponding path program 23 times [2020-07-21 00:52:29,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:29,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230008224] [2020-07-21 00:52:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:29,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11334 backedges. 662 proven. 953 refuted. 0 times theorem prover too weak. 9719 trivial. 0 not checked. [2020-07-21 00:52:30,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:33,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:33,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:33,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:34,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:35,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11334 backedges. 664 proven. 972 refuted. 0 times theorem prover too weak. 9698 trivial. 0 not checked. [2020-07-21 00:52:35,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230008224] [2020-07-21 00:52:35,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:35,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:52:35,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989222940] [2020-07-21 00:52:35,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:52:35,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:52:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:52:35,811 INFO L87 Difference]: Start difference. First operand 167 states and 333 transitions. Second operand 19 states. [2020-07-21 00:52:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:36,563 INFO L93 Difference]: Finished difference Result 230 states and 483 transitions. [2020-07-21 00:52:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:36,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 626 [2020-07-21 00:52:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:36,569 INFO L225 Difference]: With dead ends: 230 [2020-07-21 00:52:36,570 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 00:52:36,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1219 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:52:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 00:52:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2020-07-21 00:52:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-07-21 00:52:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 425 transitions. [2020-07-21 00:52:36,595 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 425 transitions. Word has length 626 [2020-07-21 00:52:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:36,596 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 425 transitions. [2020-07-21 00:52:36,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:52:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 425 transitions. [2020-07-21 00:52:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 00:52:36,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:36,603 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:36,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:36,818 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1976939290, now seen corresponding path program 24 times [2020-07-21 00:52:36,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:36,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289698074] [2020-07-21 00:52:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:37,408 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:52:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 570 proven. 424 refuted. 0 times theorem prover too weak. 3668 trivial. 0 not checked. [2020-07-21 00:52:37,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:39,079 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:52:41,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:41,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:41,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:42,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:42,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:42,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:42,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:43,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 570 proven. 451 refuted. 0 times theorem prover too weak. 3641 trivial. 0 not checked. [2020-07-21 00:52:44,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289698074] [2020-07-21 00:52:44,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:44,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:52:44,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258857221] [2020-07-21 00:52:44,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:52:44,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:52:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:52:44,385 INFO L87 Difference]: Start difference. First operand 191 states and 425 transitions. Second operand 20 states. [2020-07-21 00:52:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:45,477 INFO L93 Difference]: Finished difference Result 327 states and 922 transitions. [2020-07-21 00:52:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:45,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 407 [2020-07-21 00:52:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:45,487 INFO L225 Difference]: With dead ends: 327 [2020-07-21 00:52:45,488 INFO L226 Difference]: Without dead ends: 309 [2020-07-21 00:52:45,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 781 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:52:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-07-21 00:52:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 199. [2020-07-21 00:52:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 00:52:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 467 transitions. [2020-07-21 00:52:45,529 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 467 transitions. Word has length 407 [2020-07-21 00:52:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:45,530 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 467 transitions. [2020-07-21 00:52:45,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:52:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 467 transitions. [2020-07-21 00:52:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-21 00:52:45,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:45,538 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 26, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:45,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:45,739 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1416656537, now seen corresponding path program 25 times [2020-07-21 00:52:45,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:45,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359346156] [2020-07-21 00:52:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:46,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 240 proven. 805 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-07-21 00:52:46,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:50,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:50,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:51,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:51,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:52,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 248 proven. 818 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2020-07-21 00:52:53,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359346156] [2020-07-21 00:52:53,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:53,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:52:53,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064534058] [2020-07-21 00:52:53,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:52:53,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:52:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:52:53,250 INFO L87 Difference]: Start difference. First operand 199 states and 467 transitions. Second operand 19 states. [2020-07-21 00:52:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:54,140 INFO L93 Difference]: Finished difference Result 378 states and 1084 transitions. [2020-07-21 00:52:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:54,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 423 [2020-07-21 00:52:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:54,148 INFO L225 Difference]: With dead ends: 378 [2020-07-21 00:52:54,149 INFO L226 Difference]: Without dead ends: 245 [2020-07-21 00:52:54,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 813 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:52:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-21 00:52:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 199. [2020-07-21 00:52:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 00:52:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 450 transitions. [2020-07-21 00:52:54,187 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 450 transitions. Word has length 423 [2020-07-21 00:52:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:54,187 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 450 transitions. [2020-07-21 00:52:54,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:52:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 450 transitions. [2020-07-21 00:52:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2020-07-21 00:52:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:54,198 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 41, 41, 33, 32, 23, 23, 23, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 20, 14, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:54,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:54,413 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash -715785322, now seen corresponding path program 26 times [2020-07-21 00:52:54,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:54,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547691118] [2020-07-21 00:52:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:55,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10216 backedges. 333 proven. 1182 refuted. 0 times theorem prover too weak. 8701 trivial. 0 not checked. [2020-07-21 00:52:55,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:00,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:00,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:01,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10216 backedges. 337 proven. 1201 refuted. 0 times theorem prover too weak. 8678 trivial. 0 not checked. [2020-07-21 00:53:03,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547691118] [2020-07-21 00:53:03,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:03,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:53:03,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048419424] [2020-07-21 00:53:03,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:53:03,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:53:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:53:03,703 INFO L87 Difference]: Start difference. First operand 199 states and 450 transitions. Second operand 19 states. [2020-07-21 00:53:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:04,701 INFO L93 Difference]: Finished difference Result 313 states and 793 transitions. [2020-07-21 00:53:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:53:04,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 594 [2020-07-21 00:53:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:04,710 INFO L225 Difference]: With dead ends: 313 [2020-07-21 00:53:04,710 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 00:53:04,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1155 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:53:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 00:53:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2020-07-21 00:53:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 00:53:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 459 transitions. [2020-07-21 00:53:04,742 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 459 transitions. Word has length 594 [2020-07-21 00:53:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:04,743 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 459 transitions. [2020-07-21 00:53:04,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:53:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 459 transitions. [2020-07-21 00:53:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-07-21 00:53:04,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:04,753 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 24, 23, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:04,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:04,967 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash 244920315, now seen corresponding path program 27 times [2020-07-21 00:53:04,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:04,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869775880] [2020-07-21 00:53:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:05,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:53:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:53:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5597 backedges. 267 proven. 879 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2020-07-21 00:53:06,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:09,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:11,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5597 backedges. 268 proven. 899 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2020-07-21 00:53:12,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869775880] [2020-07-21 00:53:12,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:12,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 00:53:12,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383867112] [2020-07-21 00:53:12,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:53:12,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:53:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:53:12,903 INFO L87 Difference]: Start difference. First operand 205 states and 459 transitions. Second operand 21 states. [2020-07-21 00:53:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:13,700 INFO L93 Difference]: Finished difference Result 364 states and 986 transitions. [2020-07-21 00:53:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:53:13,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 444 [2020-07-21 00:53:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:13,709 INFO L225 Difference]: With dead ends: 364 [2020-07-21 00:53:13,710 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 00:53:13,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 853 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:53:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 00:53:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2020-07-21 00:53:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-21 00:53:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 448 transitions. [2020-07-21 00:53:13,746 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 448 transitions. Word has length 444 [2020-07-21 00:53:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:13,746 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 448 transitions. [2020-07-21 00:53:13,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:53:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 448 transitions. [2020-07-21 00:53:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-21 00:53:13,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:13,755 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:13,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:13,970 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1746055375, now seen corresponding path program 28 times [2020-07-21 00:53:13,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:13,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680980909] [2020-07-21 00:53:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:14,666 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:14,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:53:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 495 proven. 439 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2020-07-21 00:53:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:17,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:17,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:17,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:17,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:18,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:18,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:18,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:18,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:18,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 499 proven. 449 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2020-07-21 00:53:19,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680980909] [2020-07-21 00:53:19,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:19,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:53:19,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265245361] [2020-07-21 00:53:19,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:53:19,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:19,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:53:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:53:19,607 INFO L87 Difference]: Start difference. First operand 202 states and 448 transitions. Second operand 17 states. [2020-07-21 00:53:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:20,270 INFO L93 Difference]: Finished difference Result 244 states and 541 transitions. [2020-07-21 00:53:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:53:20,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 446 [2020-07-21 00:53:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:20,278 INFO L225 Difference]: With dead ends: 244 [2020-07-21 00:53:20,278 INFO L226 Difference]: Without dead ends: 235 [2020-07-21 00:53:20,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 863 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:53:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-21 00:53:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 199. [2020-07-21 00:53:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 00:53:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 438 transitions. [2020-07-21 00:53:20,304 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 438 transitions. Word has length 446 [2020-07-21 00:53:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:20,304 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 438 transitions. [2020-07-21 00:53:20,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:53:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 438 transitions. [2020-07-21 00:53:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-21 00:53:20,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:20,310 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:20,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:20,511 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -307724086, now seen corresponding path program 29 times [2020-07-21 00:53:20,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:20,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054553957] [2020-07-21 00:53:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:21,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:53:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 396 proven. 404 refuted. 0 times theorem prover too weak. 5207 trivial. 0 not checked. [2020-07-21 00:53:21,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:24,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:24,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:25,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:25,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:25,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:25,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:25,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 396 proven. 414 refuted. 0 times theorem prover too weak. 5197 trivial. 0 not checked. [2020-07-21 00:53:26,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054553957] [2020-07-21 00:53:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:26,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:53:26,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34147178] [2020-07-21 00:53:26,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:53:26,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:53:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:53:26,557 INFO L87 Difference]: Start difference. First operand 199 states and 438 transitions. Second operand 15 states. [2020-07-21 00:53:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:27,177 INFO L93 Difference]: Finished difference Result 241 states and 530 transitions. [2020-07-21 00:53:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:53:27,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 460 [2020-07-21 00:53:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:27,184 INFO L225 Difference]: With dead ends: 241 [2020-07-21 00:53:27,185 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 00:53:27,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 895 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:53:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 00:53:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 196. [2020-07-21 00:53:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 00:53:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2020-07-21 00:53:27,216 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 460 [2020-07-21 00:53:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:27,216 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2020-07-21 00:53:27,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:53:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2020-07-21 00:53:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-21 00:53:27,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:27,226 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 26, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:27,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:27,440 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1628401494, now seen corresponding path program 30 times [2020-07-21 00:53:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830866601] [2020-07-21 00:53:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:28,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:28,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:53:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 700 proven. 288 refuted. 0 times theorem prover too weak. 5017 trivial. 0 not checked. [2020-07-21 00:53:28,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:30,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:31,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:31,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:32,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:32,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:32,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:32,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:33,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 704 proven. 300 refuted. 0 times theorem prover too weak. 5001 trivial. 0 not checked. [2020-07-21 00:53:34,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830866601] [2020-07-21 00:53:34,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:34,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:53:34,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358713577] [2020-07-21 00:53:34,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:53:34,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:34,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:53:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:53:34,578 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand 17 states. [2020-07-21 00:53:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:35,252 INFO L93 Difference]: Finished difference Result 282 states and 718 transitions. [2020-07-21 00:53:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:53:35,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 460 [2020-07-21 00:53:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:35,260 INFO L225 Difference]: With dead ends: 282 [2020-07-21 00:53:35,261 INFO L226 Difference]: Without dead ends: 267 [2020-07-21 00:53:35,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 891 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:53:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-21 00:53:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 233. [2020-07-21 00:53:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 00:53:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 553 transitions. [2020-07-21 00:53:35,287 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 553 transitions. Word has length 460 [2020-07-21 00:53:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:35,287 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 553 transitions. [2020-07-21 00:53:35,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:53:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 553 transitions. [2020-07-21 00:53:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 00:53:35,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:35,295 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 26, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:35,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:35,496 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash 118874033, now seen corresponding path program 31 times [2020-07-21 00:53:35,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:35,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51629389] [2020-07-21 00:53:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:36,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:53:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:53:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7112 backedges. 533 proven. 603 refuted. 0 times theorem prover too weak. 5976 trivial. 0 not checked. [2020-07-21 00:53:36,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:40,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:41,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:41,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7112 backedges. 531 proven. 621 refuted. 0 times theorem prover too weak. 5960 trivial. 0 not checked. [2020-07-21 00:53:43,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51629389] [2020-07-21 00:53:43,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:43,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 00:53:43,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476936377] [2020-07-21 00:53:43,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:53:43,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:43,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:53:43,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:53:43,265 INFO L87 Difference]: Start difference. First operand 233 states and 553 transitions. Second operand 19 states. [2020-07-21 00:53:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:43,924 INFO L93 Difference]: Finished difference Result 301 states and 778 transitions. [2020-07-21 00:53:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:53:43,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 498 [2020-07-21 00:53:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:43,932 INFO L225 Difference]: With dead ends: 301 [2020-07-21 00:53:43,933 INFO L226 Difference]: Without dead ends: 283 [2020-07-21 00:53:43,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 965 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:53:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-21 00:53:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2020-07-21 00:53:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 00:53:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 509 transitions. [2020-07-21 00:53:43,967 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 509 transitions. Word has length 498 [2020-07-21 00:53:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:43,968 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 509 transitions. [2020-07-21 00:53:43,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:53:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 509 transitions. [2020-07-21 00:53:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 00:53:43,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:43,978 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:44,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:44,193 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash -142621718, now seen corresponding path program 32 times [2020-07-21 00:53:44,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:44,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365315806] [2020-07-21 00:53:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:45,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:53:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:53:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 761 proven. 220 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2020-07-21 00:53:45,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:47,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:47,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:47,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:47,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:48,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:48,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:48,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:49,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:49,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:49,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 765 proven. 237 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2020-07-21 00:53:51,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365315806] [2020-07-21 00:53:51,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:51,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:53:51,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765052441] [2020-07-21 00:53:51,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:53:51,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:53:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:53:51,397 INFO L87 Difference]: Start difference. First operand 215 states and 509 transitions. Second operand 19 states. [2020-07-21 00:53:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:52,274 INFO L93 Difference]: Finished difference Result 279 states and 713 transitions. [2020-07-21 00:53:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:53:52,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 407 [2020-07-21 00:53:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:52,288 INFO L225 Difference]: With dead ends: 279 [2020-07-21 00:53:52,288 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 00:53:52,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 781 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:53:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 00:53:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2020-07-21 00:53:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 00:53:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2020-07-21 00:53:52,320 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 407 [2020-07-21 00:53:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:52,321 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2020-07-21 00:53:52,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:53:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2020-07-21 00:53:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 00:53:52,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:52,330 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:52,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:52,532 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1252243851, now seen corresponding path program 33 times [2020-07-21 00:53:52,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:52,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760224853] [2020-07-21 00:53:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:53,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:53:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:53:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 674 proven. 262 refuted. 0 times theorem prover too weak. 4745 trivial. 0 not checked. [2020-07-21 00:53:53,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:56,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:57,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:57,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:57,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:58,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 676 proven. 276 refuted. 0 times theorem prover too weak. 4729 trivial. 0 not checked. [2020-07-21 00:54:00,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760224853] [2020-07-21 00:54:00,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:00,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:54:00,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968860787] [2020-07-21 00:54:00,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:54:00,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:54:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:54:00,521 INFO L87 Difference]: Start difference. First operand 220 states and 497 transitions. Second operand 17 states. [2020-07-21 00:54:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:01,333 INFO L93 Difference]: Finished difference Result 334 states and 870 transitions. [2020-07-21 00:54:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:54:01,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 00:54:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:01,344 INFO L225 Difference]: With dead ends: 334 [2020-07-21 00:54:01,344 INFO L226 Difference]: Without dead ends: 319 [2020-07-21 00:54:01,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:54:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-07-21 00:54:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 212. [2020-07-21 00:54:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 00:54:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2020-07-21 00:54:01,386 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 448 [2020-07-21 00:54:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2020-07-21 00:54:01,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:54:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2020-07-21 00:54:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-07-21 00:54:01,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:01,397 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:01,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:01,599 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash 692675228, now seen corresponding path program 34 times [2020-07-21 00:54:01,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:01,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714065677] [2020-07-21 00:54:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:02,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:54:02,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:54:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 568 proven. 164 refuted. 0 times theorem prover too weak. 4000 trivial. 0 not checked. [2020-07-21 00:54:02,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:04,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:05,064 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 00:54:05,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:05,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:05,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:05,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:06,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 570 proven. 172 refuted. 0 times theorem prover too weak. 3990 trivial. 0 not checked. [2020-07-21 00:54:07,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714065677] [2020-07-21 00:54:07,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:07,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:54:07,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435311486] [2020-07-21 00:54:07,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:54:07,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:54:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:54:07,996 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand 15 states. [2020-07-21 00:54:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:08,591 INFO L93 Difference]: Finished difference Result 352 states and 949 transitions. [2020-07-21 00:54:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:54:08,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 410 [2020-07-21 00:54:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:08,603 INFO L225 Difference]: With dead ends: 352 [2020-07-21 00:54:08,604 INFO L226 Difference]: Without dead ends: 337 [2020-07-21 00:54:08,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 795 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:54:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-07-21 00:54:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 212. [2020-07-21 00:54:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 00:54:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2020-07-21 00:54:08,641 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 410 [2020-07-21 00:54:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:08,642 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2020-07-21 00:54:08,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:54:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2020-07-21 00:54:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 00:54:08,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:08,649 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:08,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:08,850 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1103192002, now seen corresponding path program 35 times [2020-07-21 00:54:08,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:08,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736688539] [2020-07-21 00:54:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:09,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:54:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:54:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 869 proven. 211 refuted. 0 times theorem prover too weak. 4272 trivial. 0 not checked. [2020-07-21 00:54:09,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:13,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:13,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:14,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:14,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:15,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:15,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:15,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:16,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:16,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:16,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 871 proven. 230 refuted. 0 times theorem prover too weak. 4251 trivial. 0 not checked. [2020-07-21 00:54:18,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736688539] [2020-07-21 00:54:18,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:18,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:54:18,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066701287] [2020-07-21 00:54:18,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:54:18,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:54:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:54:18,183 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand 19 states. [2020-07-21 00:54:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:19,092 INFO L93 Difference]: Finished difference Result 282 states and 612 transitions. [2020-07-21 00:54:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:54:19,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 435 [2020-07-21 00:54:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:19,097 INFO L225 Difference]: With dead ends: 282 [2020-07-21 00:54:19,097 INFO L226 Difference]: Without dead ends: 267 [2020-07-21 00:54:19,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 837 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:54:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-21 00:54:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 232. [2020-07-21 00:54:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 00:54:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 498 transitions. [2020-07-21 00:54:19,129 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 498 transitions. Word has length 435 [2020-07-21 00:54:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:19,130 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 498 transitions. [2020-07-21 00:54:19,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:54:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 498 transitions. [2020-07-21 00:54:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 00:54:19,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:19,136 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:19,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:19,350 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:19,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1740376526, now seen corresponding path program 36 times [2020-07-21 00:54:19,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:19,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222539635] [2020-07-21 00:54:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:20,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:54:20,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:54:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 663 proven. 113 refuted. 0 times theorem prover too weak. 4593 trivial. 0 not checked. [2020-07-21 00:54:20,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:22,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:22,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:22,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:23,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:23,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:23,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:23,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:24,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 667 proven. 119 refuted. 0 times theorem prover too weak. 4583 trivial. 0 not checked. [2020-07-21 00:54:25,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222539635] [2020-07-21 00:54:25,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:25,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:54:25,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214664103] [2020-07-21 00:54:25,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:54:25,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:54:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:54:25,669 INFO L87 Difference]: Start difference. First operand 232 states and 498 transitions. Second operand 15 states. [2020-07-21 00:54:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:26,246 INFO L93 Difference]: Finished difference Result 314 states and 736 transitions. [2020-07-21 00:54:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:54:26,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-21 00:54:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:26,255 INFO L225 Difference]: With dead ends: 314 [2020-07-21 00:54:26,255 INFO L226 Difference]: Without dead ends: 301 [2020-07-21 00:54:26,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:54:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-21 00:54:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 248. [2020-07-21 00:54:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-21 00:54:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 550 transitions. [2020-07-21 00:54:26,296 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 550 transitions. Word has length 436 [2020-07-21 00:54:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:26,297 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 550 transitions. [2020-07-21 00:54:26,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:54:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 550 transitions. [2020-07-21 00:54:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-21 00:54:26,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:26,308 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 24, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:26,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:26,524 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash 414017659, now seen corresponding path program 37 times [2020-07-21 00:54:26,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:26,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666392657] [2020-07-21 00:54:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:27,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:54:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:54:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 313 proven. 836 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2020-07-21 00:54:27,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:31,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:33,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:34,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:35,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:35,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:35,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:35,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:36,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 312 proven. 858 refuted. 0 times theorem prover too weak. 4450 trivial. 0 not checked. [2020-07-21 00:54:36,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666392657] [2020-07-21 00:54:36,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:36,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 00:54:36,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893203304] [2020-07-21 00:54:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:54:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:54:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:54:36,640 INFO L87 Difference]: Start difference. First operand 248 states and 550 transitions. Second operand 21 states. [2020-07-21 00:54:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:38,187 INFO L93 Difference]: Finished difference Result 317 states and 683 transitions. [2020-07-21 00:54:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:54:38,192 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 445 [2020-07-21 00:54:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:38,198 INFO L225 Difference]: With dead ends: 317 [2020-07-21 00:54:38,198 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 00:54:38,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 855 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:54:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 00:54:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 237. [2020-07-21 00:54:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-21 00:54:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 505 transitions. [2020-07-21 00:54:38,230 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 505 transitions. Word has length 445 [2020-07-21 00:54:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:38,230 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 505 transitions. [2020-07-21 00:54:38,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:54:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 505 transitions. [2020-07-21 00:54:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2020-07-21 00:54:38,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:38,236 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 30, 30, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:38,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:38,438 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1747827503, now seen corresponding path program 38 times [2020-07-21 00:54:38,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:38,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193312559] [2020-07-21 00:54:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:39,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:54:39,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:54:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 889 proven. 324 refuted. 0 times theorem prover too weak. 6801 trivial. 0 not checked. [2020-07-21 00:54:39,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:43,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:43,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:44,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:45,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:45,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:45,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:46,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:46,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:46,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 889 proven. 344 refuted. 0 times theorem prover too weak. 6781 trivial. 0 not checked. [2020-07-21 00:54:48,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193312559] [2020-07-21 00:54:48,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:48,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:54:48,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831409503] [2020-07-21 00:54:48,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:54:48,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:54:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:54:48,937 INFO L87 Difference]: Start difference. First operand 237 states and 505 transitions. Second operand 17 states. [2020-07-21 00:54:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:49,920 INFO L93 Difference]: Finished difference Result 325 states and 744 transitions. [2020-07-21 00:54:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:54:49,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 529 [2020-07-21 00:54:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:49,932 INFO L225 Difference]: With dead ends: 325 [2020-07-21 00:54:49,933 INFO L226 Difference]: Without dead ends: 304 [2020-07-21 00:54:49,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 1029 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:54:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-21 00:54:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 260. [2020-07-21 00:54:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-21 00:54:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 562 transitions. [2020-07-21 00:54:49,973 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 562 transitions. Word has length 529 [2020-07-21 00:54:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:49,973 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 562 transitions. [2020-07-21 00:54:49,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:54:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 562 transitions. [2020-07-21 00:54:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 00:54:49,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:49,980 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:50,181 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1281087882, now seen corresponding path program 39 times [2020-07-21 00:54:50,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:50,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925663358] [2020-07-21 00:54:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:51,116 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:54:51,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:51,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:54:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 515 proven. 479 refuted. 0 times theorem prover too weak. 5064 trivial. 0 not checked. [2020-07-21 00:54:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:56,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:58,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 519 proven. 491 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2020-07-21 00:54:59,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925663358] [2020-07-21 00:54:59,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:59,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:54:59,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857655401] [2020-07-21 00:54:59,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:54:59,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:54:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:54:59,152 INFO L87 Difference]: Start difference. First operand 260 states and 562 transitions. Second operand 17 states. [2020-07-21 00:54:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:59,576 INFO L93 Difference]: Finished difference Result 311 states and 677 transitions. [2020-07-21 00:54:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:54:59,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-21 00:54:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:59,583 INFO L225 Difference]: With dead ends: 311 [2020-07-21 00:54:59,583 INFO L226 Difference]: Without dead ends: 296 [2020-07-21 00:54:59,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 895 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:54:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-21 00:54:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2020-07-21 00:54:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-21 00:54:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 542 transitions. [2020-07-21 00:54:59,608 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 542 transitions. Word has length 462 [2020-07-21 00:54:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:59,608 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 542 transitions. [2020-07-21 00:54:59,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:54:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 542 transitions. [2020-07-21 00:54:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-07-21 00:54:59,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:59,613 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:59,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:59,814 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash -156857600, now seen corresponding path program 40 times [2020-07-21 00:54:59,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:59,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076661239] [2020-07-21 00:54:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:00,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:55:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:55:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6031 backedges. 795 proven. 250 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-21 00:55:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:03,109 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-21 00:55:04,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:04,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:05,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:05,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:06,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:06,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:07,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:07,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:07,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:07,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:07,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:08,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6031 backedges. 795 proven. 264 refuted. 0 times theorem prover too weak. 4972 trivial. 0 not checked. [2020-07-21 00:55:10,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076661239] [2020-07-21 00:55:10,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:10,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 00:55:10,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850457368] [2020-07-21 00:55:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:55:10,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:55:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:55:10,492 INFO L87 Difference]: Start difference. First operand 252 states and 542 transitions. Second operand 19 states. [2020-07-21 00:55:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:11,913 INFO L93 Difference]: Finished difference Result 322 states and 692 transitions. [2020-07-21 00:55:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:55:11,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 461 [2020-07-21 00:55:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:11,920 INFO L225 Difference]: With dead ends: 322 [2020-07-21 00:55:11,920 INFO L226 Difference]: Without dead ends: 307 [2020-07-21 00:55:11,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 891 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:55:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-07-21 00:55:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 243. [2020-07-21 00:55:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-21 00:55:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 505 transitions. [2020-07-21 00:55:11,952 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 505 transitions. Word has length 461 [2020-07-21 00:55:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:11,953 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 505 transitions. [2020-07-21 00:55:11,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:55:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 505 transitions. [2020-07-21 00:55:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 00:55:11,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:11,959 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:12,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:12,160 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1873928601, now seen corresponding path program 41 times [2020-07-21 00:55:12,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:12,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119967008] [2020-07-21 00:55:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:13,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:55:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:55:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 695 proven. 243 refuted. 0 times theorem prover too weak. 4743 trivial. 0 not checked. [2020-07-21 00:55:13,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:17,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:17,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:17,762 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:55:18,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:18,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:19,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:20,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 699 proven. 253 refuted. 0 times theorem prover too weak. 4729 trivial. 0 not checked. [2020-07-21 00:55:22,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119967008] [2020-07-21 00:55:22,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:22,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:55:22,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831356607] [2020-07-21 00:55:22,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:55:22,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:55:22,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:55:22,643 INFO L87 Difference]: Start difference. First operand 243 states and 505 transitions. Second operand 17 states. [2020-07-21 00:55:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:23,666 INFO L93 Difference]: Finished difference Result 339 states and 742 transitions. [2020-07-21 00:55:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:55:23,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 00:55:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:23,682 INFO L225 Difference]: With dead ends: 339 [2020-07-21 00:55:23,682 INFO L226 Difference]: Without dead ends: 324 [2020-07-21 00:55:23,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:55:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-07-21 00:55:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 238. [2020-07-21 00:55:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 00:55:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 487 transitions. [2020-07-21 00:55:23,742 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 487 transitions. Word has length 448 [2020-07-21 00:55:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:23,742 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 487 transitions. [2020-07-21 00:55:23,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:55:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 487 transitions. [2020-07-21 00:55:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 00:55:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:23,754 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:23,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:23,969 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:23,970 INFO L82 PathProgramCache]: Analyzing trace with hash -443595445, now seen corresponding path program 42 times [2020-07-21 00:55:23,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:23,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578525566] [2020-07-21 00:55:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:25,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:55:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:55:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 610 proven. 193 refuted. 0 times theorem prover too weak. 4903 trivial. 0 not checked. [2020-07-21 00:55:25,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:28,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:29,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:30,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 610 proven. 205 refuted. 0 times theorem prover too weak. 4891 trivial. 0 not checked. [2020-07-21 00:55:32,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578525566] [2020-07-21 00:55:32,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:55:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971886930] [2020-07-21 00:55:32,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:55:32,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:55:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:55:32,353 INFO L87 Difference]: Start difference. First operand 238 states and 487 transitions. Second operand 15 states. [2020-07-21 00:55:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:33,108 INFO L93 Difference]: Finished difference Result 266 states and 534 transitions. [2020-07-21 00:55:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:55:33,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 449 [2020-07-21 00:55:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:33,117 INFO L225 Difference]: With dead ends: 266 [2020-07-21 00:55:33,117 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 00:55:33,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 873 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:55:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 00:55:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 230. [2020-07-21 00:55:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-21 00:55:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 460 transitions. [2020-07-21 00:55:33,146 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 460 transitions. Word has length 449 [2020-07-21 00:55:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:33,146 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 460 transitions. [2020-07-21 00:55:33,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:55:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 460 transitions. [2020-07-21 00:55:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 00:55:33,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:33,157 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:33,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:33,370 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2121837365, now seen corresponding path program 43 times [2020-07-21 00:55:33,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:33,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460285976] [2020-07-21 00:55:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:34,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:55:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:55:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6402 backedges. 609 proven. 215 refuted. 0 times theorem prover too weak. 5578 trivial. 0 not checked. [2020-07-21 00:55:34,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:36,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:37,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:38,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:38,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:38,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:38,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:38,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6402 backedges. 609 proven. 225 refuted. 0 times theorem prover too weak. 5568 trivial. 0 not checked. [2020-07-21 00:55:40,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460285976] [2020-07-21 00:55:40,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:40,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:55:40,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345440855] [2020-07-21 00:55:40,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:55:40,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:55:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:55:40,588 INFO L87 Difference]: Start difference. First operand 230 states and 460 transitions. Second operand 15 states. [2020-07-21 00:55:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:41,023 INFO L93 Difference]: Finished difference Result 271 states and 553 transitions. [2020-07-21 00:55:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:55:41,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 474 [2020-07-21 00:55:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:41,029 INFO L225 Difference]: With dead ends: 271 [2020-07-21 00:55:41,029 INFO L226 Difference]: Without dead ends: 256 [2020-07-21 00:55:41,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:55:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-21 00:55:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 233. [2020-07-21 00:55:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 00:55:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 469 transitions. [2020-07-21 00:55:41,049 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 469 transitions. Word has length 474 [2020-07-21 00:55:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:41,050 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 469 transitions. [2020-07-21 00:55:41,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:55:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 469 transitions. [2020-07-21 00:55:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 00:55:41,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:41,055 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:41,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:41,256 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash 243569563, now seen corresponding path program 44 times [2020-07-21 00:55:41,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:41,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123041505] [2020-07-21 00:55:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:42,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:55:42,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:55:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 735 proven. 207 refuted. 0 times theorem prover too weak. 4776 trivial. 0 not checked. [2020-07-21 00:55:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:45,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:45,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:46,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:48,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:48,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 739 proven. 219 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-07-21 00:55:51,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123041505] [2020-07-21 00:55:51,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:51,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:55:51,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849205754] [2020-07-21 00:55:51,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:55:51,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:55:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:55:51,115 INFO L87 Difference]: Start difference. First operand 233 states and 469 transitions. Second operand 17 states. [2020-07-21 00:55:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:51,973 INFO L93 Difference]: Finished difference Result 263 states and 526 transitions. [2020-07-21 00:55:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:55:51,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-21 00:55:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:51,985 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:55:51,985 INFO L226 Difference]: Without dead ends: 248 [2020-07-21 00:55:51,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:55:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-21 00:55:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 224. [2020-07-21 00:55:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-21 00:55:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 449 transitions. [2020-07-21 00:55:52,013 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 449 transitions. Word has length 449 [2020-07-21 00:55:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:52,013 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 449 transitions. [2020-07-21 00:55:52,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:55:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 449 transitions. [2020-07-21 00:55:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 00:55:52,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:52,025 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:52,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:52,239 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1881476827, now seen corresponding path program 45 times [2020-07-21 00:55:52,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:52,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434698195] [2020-07-21 00:55:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:53,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:55:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:55:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 810 proven. 131 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2020-07-21 00:55:53,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:57,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:58,158 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:55:58,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:58,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:58,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:58,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:59,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:59,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:59,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:59,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:59,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:00,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 816 proven. 139 refuted. 0 times theorem prover too weak. 4738 trivial. 0 not checked. [2020-07-21 00:56:03,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434698195] [2020-07-21 00:56:03,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:03,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:56:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148463896] [2020-07-21 00:56:03,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:56:03,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:56:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:56:03,240 INFO L87 Difference]: Start difference. First operand 224 states and 449 transitions. Second operand 17 states. [2020-07-21 00:56:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:56:04,261 INFO L93 Difference]: Finished difference Result 265 states and 532 transitions. [2020-07-21 00:56:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:56:04,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 00:56:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:56:04,273 INFO L225 Difference]: With dead ends: 265 [2020-07-21 00:56:04,273 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 00:56:04,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:56:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 00:56:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2020-07-21 00:56:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 00:56:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2020-07-21 00:56:04,301 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 448 [2020-07-21 00:56:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:56:04,301 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2020-07-21 00:56:04,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:56:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2020-07-21 00:56:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 00:56:04,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:56:04,307 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:56:04,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:04,509 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:56:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:56:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1723992425, now seen corresponding path program 46 times [2020-07-21 00:56:04,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:56:04,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974996648] [2020-07-21 00:56:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:05,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:56:05,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:56:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:56:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:56:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 656 proven. 120 refuted. 0 times theorem prover too weak. 4943 trivial. 0 not checked. [2020-07-21 00:56:05,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:56:08,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:10,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:11,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 658 proven. 128 refuted. 0 times theorem prover too weak. 4933 trivial. 0 not checked. [2020-07-21 00:56:14,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974996648] [2020-07-21 00:56:14,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:14,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:56:14,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383738443] [2020-07-21 00:56:14,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:56:14,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:56:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:56:14,085 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand 15 states. [2020-07-21 00:56:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:56:14,917 INFO L93 Difference]: Finished difference Result 272 states and 542 transitions. [2020-07-21 00:56:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:56:14,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 449 [2020-07-21 00:56:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:56:14,928 INFO L225 Difference]: With dead ends: 272 [2020-07-21 00:56:14,929 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 00:56:14,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 873 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:56:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 00:56:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 208. [2020-07-21 00:56:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 00:56:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 406 transitions. [2020-07-21 00:56:14,953 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 406 transitions. Word has length 449 [2020-07-21 00:56:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:56:14,954 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 406 transitions. [2020-07-21 00:56:14,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:56:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 406 transitions. [2020-07-21 00:56:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 00:56:14,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:56:14,959 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:56:15,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:15,164 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:56:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:56:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -357877815, now seen corresponding path program 47 times [2020-07-21 00:56:15,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:56:15,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393017264] [2020-07-21 00:56:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:16,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:56:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:56:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:56:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:56:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 113 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2020-07-21 00:56:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:56:18,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:18,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:21,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 120 refuted. 0 times theorem prover too weak. 5092 trivial. 0 not checked. [2020-07-21 00:56:23,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393017264] [2020-07-21 00:56:23,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:23,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:56:23,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408276514] [2020-07-21 00:56:23,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:56:23,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:56:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:56:23,861 INFO L87 Difference]: Start difference. First operand 208 states and 406 transitions. Second operand 13 states. [2020-07-21 00:56:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:56:24,234 INFO L93 Difference]: Finished difference Result 262 states and 550 transitions. [2020-07-21 00:56:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:56:24,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 450 [2020-07-21 00:56:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:56:24,243 INFO L225 Difference]: With dead ends: 262 [2020-07-21 00:56:24,243 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 00:56:24,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:56:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 00:56:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 208. [2020-07-21 00:56:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 00:56:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 406 transitions. [2020-07-21 00:56:24,266 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 406 transitions. Word has length 450 [2020-07-21 00:56:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:56:24,267 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 406 transitions. [2020-07-21 00:56:24,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:56:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 406 transitions. [2020-07-21 00:56:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 00:56:24,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:56:24,272 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:56:24,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:24,474 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:56:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:56:24,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 48 times [2020-07-21 00:56:24,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:56:24,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004455918] [2020-07-21 00:56:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:25,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:56:25,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 00:56:25,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:56:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 00:56:25,561 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:56:25,739 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 00:56:25,739 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 00:56:25,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:26,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:56:26 BoogieIcfgContainer [2020-07-21 00:56:26,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:56:26,152 INFO L168 Benchmark]: Toolchain (without parser) took 399171.30 ms. Allocated memory was 143.7 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 101.8 MB in the beginning and 289.2 MB in the end (delta: -187.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,153 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.00 ms. Allocated memory is still 143.7 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,154 INFO L168 Benchmark]: Boogie Preprocessor took 147.96 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.9 MB in the beginning and 180.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,155 INFO L168 Benchmark]: RCFGBuilder took 356.77 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,155 INFO L168 Benchmark]: TraceAbstraction took 398305.04 ms. Allocated memory was 201.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 166.3 MB in the beginning and 289.2 MB in the end (delta: -123.0 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2020-07-21 00:56:26,158 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.00 ms. Allocated memory is still 143.7 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.96 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.9 MB in the beginning and 180.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.77 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 398305.04 ms. Allocated memory was 201.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 166.3 MB in the beginning and 289.2 MB in the end (delta: -123.0 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 398.0s, OverallIterations: 65, TraceHistogramMax: 49, AutomataDifference: 38.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1757 SDtfs, 3269 SDslu, 12344 SDs, 0 SdLazy, 13383 SolverSat, 3374 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47234 GetRequests, 45133 SyntacticMatches, 784 SemanticMatches, 1317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6115 ImplicationChecksByTransitivity, 37.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 64 MinimizatonAttempts, 2596 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 311.6s InterpolantComputationTime, 23928 NumberOfCodeBlocks, 14501 NumberOfCodeBlocksAsserted, 151 NumberOfCheckSat, 46777 ConstructedInterpolants, 0 QuantifiedInterpolants, 26888321 SizeOfPredicates, 433 NumberOfNonLiveVariables, 31162 ConjunctsInSsa, 871 ConjunctsInUnsatCore, 126 InterpolantComputations, 2 PerfectInterpolantSequences, 530420/587070 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...